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Digital Electronics
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Digital Concepts
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Question
Digital representations of numerical values of quantities may BEST be described as having characteristics:
Options
A. that are difficult to interpret because they are continuously changing.
B. that vary constantly over a continuous range of values.
C. that vary in constant and direct proportion to the values they represent.
D. that vary in discrete steps in proportion to the values they represent.
Correct Answer
that vary in discrete steps in proportion to the values they represent.
Digital Concepts problems
Search Results
1. A pulse has a period of 15 ms. Its frequency is ________.
Options
A. 6.66 Hz
B. 66.66 Hz
C. 666.66 Hz
D. 15 Hz
Show Answer
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Correct Answer: 66.66 Hz
2. The output of a NOT gate is HIGH when ________.
Options
A. the input is LOW
B. the input is HIGH
C. the input changes from LOW to HIGH
D. voltage is removed from the gate
Show Answer
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Correct Answer: the input is LOW
3. What is one relative disadvantage of serial transfer?
Options
A. It requires too many conductors.
B. Its interconnect system is complex.
C. It is slow.
D. It can only be used over very short distances.
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Correct Answer: It is slow.
4. Which format requires fewer conductors?
Options
A. Parallel
B. Serial
C. Both are the same
D. Cannot tell
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Correct Answer: Serial
5. Parallel format means that:
Options
A. each digital signal has its own conductor.
B. several digital signals are sent on each conductor.
C. both binary and hexadecimal can be used.
D. no clock is needed.
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Correct Answer: each digital signal has its own conductor.
6. Which format can send several bits of information faster?
Options
A. Parallel
B. Serial
C. Both are the same
D. Cannot tell
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Correct Answer: Parallel
7. In positive logic, ________.
Options
A. a HIGH = 1, a LOW = 0
B. a LOW = 1, a HIGH = 0
C. only HIGHs are present
D. only LOWs are present
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Correct Answer: a HIGH = 1, a LOW = 0
8. What is an analog-to-digital converter?
Options
A. It makes digital signals.
B. It takes analog signals and puts them in digital format.
C. It allows the use of digital signals in everyday life.
D. It stores information on a CD.
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Correct Answer: It takes analog signals and puts them in digital format.
9. In the decimal numbering system, what is the MSD?
Options
A. The middle digit of a stream of numbers
B. The digit to the right of the decimal point
C. The last digit on the right
D. The digit with the most weight
Show Answer
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Correct Answer: The digit with the most weight
10. The output of an AND gate is LOW ________.
Options
A. all the time
B. when any input is LOW
C. when any input is HIGH
D. when all inputs are HIGH
Show Answer
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Discuss
Correct Answer: when any input is LOW
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